binutils: fix CVE-2025-69647

Backport upstream fix for CVE-2025-69647 [1].

[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=455446bbdc8675f34808187de2bbad4682016ff7

(From OE-Core rev: a15dfc1a05ba26ae9f806b0f4c5273bb7c484a04)

Signed-off-by: Adarsh Jagadish Kamini <adarsh.jagadish.kamini@est.tech>
Signed-off-by: Fabien Thomas <fabien.thomas@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

2 files changed, 86 insertions, 0 deletions

diff --git a/meta/recipes-devtools/binutils/binutils-2.42.inc b/meta/recipes-devtools/binutils/binutils-2.42.inc
index 096ccf42c2..fcbe7fbfab 100644
--- a/meta/recipes-devtools/binutils/binutils-2.42.inc
+++ b/meta/recipes-devtools/binutils/binutils-2.42.inc
@@ -72,5 +72,6 @@ SRC_URI = "\
      file://0028-CVE-2025-11494.patch \
      file://0029-CVE-2025-11839.patch \
      file://0030-CVE-2025-11840.patch \
+     file://CVE-2025-69647.patch \
 "
 S  = "${WORKDIR}/git"
diff --git a/meta/recipes-devtools/binutils/binutils/CVE-2025-69647.patch b/meta/recipes-devtools/binutils/binutils/CVE-2025-69647.patch
new file mode 100644
index 0000000000..8e3c1c79e7
--- /dev/null
+++ b/meta/recipes-devtools/binutils/binutils/CVE-2025-69647.patch
@@ -0,0 +1,85 @@
+From c87ed59208e1ce665f08ae2b2d8c1cdc2a653ea2 Mon Sep 17 00:00:00 2001
+From: Alan Modra <amodra@gmail.com>
+Date: Sat, 22 Nov 2025 09:52:18 +1030
+Subject: [PATCH] PR 33639 .debug_loclists output
+
+The fuzzed testcase in this PR prints an almost endless table of
+offsets, due to a bogus offset count.  Limit that count, and the total
+length too.
+
+        PR 33639
+        * dwarf.c (display_loclists_unit_header): Return error on
+        length too small to read header.  Limit length to section
+        size.  Limit offset count similarly.
+
+CVE: CVE-2025-69647
+
+Upstream-Status: Backport [https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=455446bbdc8675f34808187de2bbad4682016ff7]
+
+Signed-off-by: Adarsh Jagadish Kamini <adarsh.jagadish.kamini@est.tech>
+---
+ binutils/dwarf.c | 20 ++++++++++++++------
+ 1 file changed, 14 insertions(+), 6 deletions(-)
+
+diff --git a/binutils/dwarf.c b/binutils/dwarf.c
+index 72bc9d7497a..06d68074046 100644
+--- a/binutils/dwarf.c
++++ b/binutils/dwarf.c
+@@ -7221,8 +7221,6 @@ display_loclists_unit_header (struct dwarf_section *  section,
+   bool is_64bit;
+   uint32_t i;
+ 
+-  printf (_("Table at Offset %#" PRIx64 "\n"), header_offset);
+-
+   SAFE_BYTE_GET_AND_INC (length, start, 4, end);
+   if (length == 0xffffffff)
+     {
+@@ -7231,6 +7229,11 @@ display_loclists_unit_header (struct dwarf_section *  section,
+     }
+   else
+     is_64bit = false;
++  if (length < 8)
++    return (uint64_t) -1;
++
++  printf (_("Table at Offset %#" PRIx64 "\n"), header_offset);
++  header_offset = start - section->start;
+ 
+   SAFE_BYTE_GET_AND_INC (version, start, 2, end);
+   SAFE_BYTE_GET_AND_INC (address_size, start, 1, end);
+@@ -7243,15 +7246,21 @@ display_loclists_unit_header (struct dwarf_section *  section,
+   printf (_("  Segment size:    %u\n"), segment_selector_size);
+   printf (_("  Offset entries:  %u\n"), *offset_count);
+ 
++  if (length > section->size - header_offset)
++    length = section->size - header_offset;
++
+   if (segment_selector_size != 0)
+     {
+       warn (_("The %s section contains an "
+              "unsupported segment selector size: %d.\n"),
+            section->name, segment_selector_size);
+-      return (uint64_t)-1;
++      return (uint64_t) -1;
+     }
+ 
+-  if ( *offset_count)
++  uint64_t max_off_count = length >> (is_64bit ? 3 : 2);
++  if (*offset_count > max_off_count)
++    *offset_count = max_off_count;
++  if (*offset_count)
+     {
+       printf (_("\n   Offset Entries starting at %#tx:\n"),
+              start - section->start);
+@@ -7268,8 +7277,7 @@ display_loclists_unit_header (struct dwarf_section *  section,
+   putchar ('\n');
+   *loclists_start = start;
+ 
+-  /* The length field doesn't include the length field itself.  */
+-  return header_offset + length + (is_64bit ? 12 : 4);
++  return header_offset + length;
+ }
+ 
+ static int
+-- 
+2.34.1
+